I finally had a chance to look at this and... I think it's a bad combination not
a bad auto-tube. I'm guessing because this is a lens I don't have but...
<casting grains of salt everywhere> The big question is does the lens have any
way of transmitting aperture to the camera body? If so does the auto-tube
transmit it when the lens is mounted on the auto-tube? If it's like the PM-MTob
lenses, there is no linkage between the two. The old style macros, or at least
my PM-MTob based ones do not engage the levers** in the auto-tube that make it
an auto tube. Effectively the auto-tube is saying "the lens I have mounted is
wide open right now but will stop down a long way when you fire the shutter".
In the non-auto extension tubes the pin is fixed to say "as wide open as I'm
going to get". Unfortunately, I can't forge this into an explanation of why
"auto" doesn't work anyway but spot does.
after much snipping Gary Edwards wrote:
>>
I just got a beautiful 65-116 ... It works fine with my 50/3.5 macro and my
85/2,
but it doesn't ... work with my old style, preset aperture Zuiko 80
mm f/4 1:1 macro lens.<<
** darn it what should I be calling these?, one is the "delta between wide open
and set aperture" and the other is the "close the aperture"
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